mx.druztemix.com has no NS records.
NS records for this zone are defined at druztemix.com.
NS records for this zone are defined at druztemix.com.
Question and response
Question
dig mx.druztemix.com. NS
Answer
The response has no answer records.
Authority
druztemix.com. 3600 SOA dns.druztemix.com. hostmaster.druztemix.com. 1718910679 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0